30fps may be fine for a game like Red Dead Redemption, but a racing game @30fps is universally bad
30 isn’t bad, but higher is generally better. There are diminishing returns after 120 though, and I don’t think anyone could actually use 240fps.
Have you ever played on a 240 / 280 / 360 Hz Display? Or played an esports title where low frametimes/ input delay are important? The difference in how fluid and responsive a game feels is massive between 120 and 240+ fps.
120 -> 240 isn’t nearly as massive as 10 -> 20. That’s why it’s diminishing returns, each frame is less improvement as the numbers get higher.